Distal femoral osteosarcoma with pathological fracture

Case contributed by Dr Angela Byrne


Left knee pain

Patient Data

Age: 7 years
Gender: Male
  • lateral and frontal radiographs at initial presentation (1 and 2)
    • aggressive bone lesion in the distal femur
    • wide zone of transition
  • lateral and frontal radiographs 2 weeks later (3 and 4)
    • the lesion has enlarged
    • new pathological fracture
  • lateral and frontal radiographs of fracture on follow up (5 and 6)
    • marked periosteal reaction
    • impaction of the previously imaged pathological fracture

Osteosarcoma in the distal femur on radionuclide bone scan.

STIR, T1, and T2 with fat saturation demonstrate the extensive soft tissue component, not apparent on the initial presentation radiographs.

Case Discussion

Osteosarcoma in a pediatric patient who presented initially with knee pain and suffered a pathological fracture two weeks later.

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